<?php
$text = "Мыло раз victory1@gmail.com
мыло два failure13@yahoo.com";
$regexp = "/[a-z0-9_+.-]+@[a-z.-]+/i";
$emails = array();
$count = preg_match_all($regexp, $text, $emails);
for ($i = 0; $i < $count; $i++) {
	echo $emails[0][$i] . "\n";
}